package com.bycx.core.util;

import org.apache.commons.beanutils.BeanUtils;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

public class BeanUtil {
	// Map --> Bean 2: 利用org.apache.commons.beanutils 工具类实现 Map --> Bean  
	public static void transMap2Bean2(Map<String, Object> map, Object obj) {  
		if (map == null || obj == null) {  
			return;  
		}  
		try {  
			BeanUtils.populate(obj, map);
		} catch (Exception e) {  
			System.out.println("transMap2Bean2 Error " + e);  
		}  
	}  

	// Map --> Bean 1: 利用Introspector,PropertyDescriptor实现 Map --> Bean  
	public static void transMap2Bean(Map<String, Object> map, Object obj) {  

		try {  
			BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());  
			PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();  

			for (PropertyDescriptor property : propertyDescriptors) {  
				String key = property.getName();  

				if (map.containsKey(key)) {  
					Object value = map.get(key);  
					// 得到property对应的setter方法  
					Method setter = property.getWriteMethod();  
					setter.invoke(obj, value);  
				}  

			}  

		} catch (Exception e) {  
			System.out.println("transMap2Bean Error " + e);  
		}  

		return;  

	}  

	// Bean --> Map 1: 利用Introspector和PropertyDescriptor 将Bean --> Map  
	public static Map<String, Object> transBean2Map(Object obj) {  

		if(obj == null){  
			return null;  
		}          
		Map<String, Object> map = new HashMap<String, Object>();  
		try {  
			BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());  
			PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();  
			for (PropertyDescriptor property : propertyDescriptors) {  
				String key = property.getName();  

				// 过滤class属性  
				if (!key.equals("class")) {  
					// 得到property对应的getter方法  
					Method getter = property.getReadMethod();  
					Object value = getter.invoke(obj);  

					map.put(key, value);  
				}  

			}  
		} catch (Exception e) {  
			System.out.println("transBean2Map Error " + e);  
		}  

		return map;  

	}  
}
